James robertson



(Model) J. ROBERTSON.

DEVICE FOR RUNNING 0N BELTS T0 MACHINERY. No. 248,507. Patented Oct.18,1881.

N, PETERS. Pholoulhngrapbfir Walhvnglnn 0 C UNITED STATES PATENT OFrrcE.

JAMES ROBERTSON, OEMIDDLETOWN, CONNECTICUT, ASSIGNOR TO THE VICTORSEWING MACHINE COMPANY, OF SAME PLACE.

DEVICE FOR RUNNING ON BELTS TO MACHINERY.

SPECIFICATION forming part of Letters Patent No. 248,507, dated October18, 18 81. Application filed September 17, 1881. (Model) To all whom itmay concern:

Be it known that I, JAMES ROBERTSON, a citizen of the United States,formerly of Florence, Massachusetts, but now residing at Middletown, inthe county of Middlesex and State of Connecticut, haveinvented new anduseful Improvements in Devices for Running on Belts to lVIachinery ofwhich the following is a speciflcation.

This invention relates to that class of devices which are employed forfacilitating the replacement of the belt upon the usual pulleywheel of asewing or other machine.

Prior to my invention a pulley-wheel has been provided with a tooth orfinger formed with an out-turned portion or lip presenting a spiral faceadapted to catch and direct the belt into place upon the pulley as thelatteris turned by means of a handle with which it is provided. Apulley-wheel has also been provided with a pivoted dog having one edgeformed with a recess for engaging a belt and retaining it in contactwith pulley; and in another instance the belt wheel or pulley has beenprovided with a sliding or turning spring hook or button swinging overthe groove of the Wheel, so as to enable the operator to run on the beltwithout bending down and carrying the belt with the hand around thewheel.

It is the object of my invention to simplify the means employed forrunning the belt onto the scored pulley-wheel; and to such end itconsists in combining with the fly-wheel a scored pulley-wheel having anotch or recess formed in one of its peripheral flanges, said notchhaving a straight or hook-shaped wall for engaging the belt, and anopposite inclined wall for allowing the belt to slip over the flange andpass into the pulley-groove, in the manner hereinafter described andillustrated in the accompanying drawings, in which- Figure 1 is a sideView of the fly-wheel and the pulley-wheel provided with my improvement.Fig. 2 is a view of the faces of said wheels; and Fig.3 is a side Viewwith the belt caught in the recess of the pulley-wheel.

The letter A designates the fly-wheel, and B the ordinary scored orgrooved pulley-wheel, of

' a sewing-machine. These two wheels are preferably cast in one piece,although, if desired, they can beform ed separatelyand then securedtogether in any suitable way. A notch or recess, C, is formed in one ofthe peripheral flanges of the pulley-wheel, and has one ofits walls, 0,somewhat obliqued to the plane of the pulley,and its opposite wall, 0made either hook-shaped or straight and at or about right angles to theplane of said pulley, so that the disengaged belt can be readily caughton the wall 0 in the first instance, and then, as the pulley is turned,it will slip over the oblique wall 0 and automatically run onto thepulley.

The belt automatically assumes its place upon the periphery of thepulley without requiring any further manipulation than engaging the samein a recess, the pulley being provided with a handle, so that it can beturned after the belt-has been caught in the recess, in order to throwthe belt onto the pulley.

It will be seen that it will involve no extra expense to cast thepulley-wheel with the notch or recess, and also that the pulley-wheelhas no dogs or projections that can be bent, broken oft, or otherwiseinjured.

The belt can be readily applied to or removed from the pulley-wheel,which will be especially useful in sewing-machines and in smallmachinery generally, where it is often found desirable to throw on oroff a belt.

What I claim is- The combination, with the tly-wheel, of thepulley-wheel carried thereby, and having a recess formed in its flangedrim for engaging the belt, in order to automatically throw the same ontothe wheel as the latter is turned, one wall of said recess being formedto hold the belt, and the opposite wall being formed to allow the beltto automaticallyslip over the same and run onto the wheel, substantiallyas described.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

JAMES ROBERTSON.

IVitnesses:

S. GLEAVELAND, J r., GEO. M. PRATT.

